Herbert s



Patented Oct. 6, 1925.

UNITED STATES.y

.1,556,237 imTaNTt.ol-rica HERBERT S. MILLS, OF OAK PARK, 4ILLINOIS, ASSIGNOR TO MILLS NOVELTY COM- -PANY, OF CHICAGO, ILLINOIS. A CORPORATION F ILLINOIS.` y

ROSIN COMPOUND AD PROCSS FOR PRODUCING- SAME.

Application filed May 23, 1924. Serial N9. 715,305.

To all Lc/20m t 'mag/,concern j Be it known that I, Hnunnnr' S. MzLLs. a citizen of the nited States, residing at Oak Park. in the county of Cook andA State of 5 Illinois. have invented a new and Iuseful Im provement in Rosin Compoundsand Processes for ProducingSa1ne,of which the following is a specification. v

This invention relates to the production of a rosin compound which is particularly suited oraise in rosining a disk-bow of anv cd. A further object is to provide a readily practiced process for producing the compound and improved apparatus adapted for use in connection with such process.

The accompanying drawing illustrates the improved apparatus which mayv be advantageously employed for practicing the improved process to produce the new compound, the view being a sectional elevation. The compound may be composed of about seven pounds ot rosin and one pound of `gum sandarac. Those ingredients ar(` blended into a compound ot' uniform composition by means of the improved process which will be presentlyv described.v It is preferred. also, tointroduce into the compound a small percentage of raw linseed oil. l

A composition which has proven highly satisfactory in use maybe prepared by employing six and three-fourths pounds rosin and one pound gum sandarac. with asmall percentage of raw linseed oil added, say about one-fourth pint.` The proportions may bc varied, but it is desirable that the rosin pounds rosin to one poundthe purpose. Allow the rosin and gum to dissolve; distill o tl" the' alcohol; add onefourth pint of raw linseed oil; and then agi,-

v. tate -or stir the mixture, while in Huid or viscous condition, for a few minutes. The ydistillingI Yandv agitating koperations may be carried on in 'a suitable vessel, separatefrom .the dissolving tank, if desired. The alcohol distilled from the mixture may pass to a condenser and be recovered.

The rosin compound `may be drawn from the distilling vessel and introduced into an electric boiler. and there boiled for. about twenty-five minutes. The froth or foam may then be burned from the top surface of the `rosin compound, and the rosin compound may` be poured in the molds and allowed to cool. The purpose of the use ot' a small percentage of linseed oil is primarily to increase the fluidity of the lcomposition whcnjit is in the heated condition and to enhance the intimate mixture. or blending ot the rosin and gum sandarac, the purpose being to produce j a substantially homogeneous compound.

Referring tothe drawing. Arepresents a dissolving tank; B, a distilling and mixing tank; and C, a condenser. v Y

The dissolving tank A preferably has its lower portion located in a jackety 1; and the distilling'tank B is equipped with a jacket 2. The tank B may be equipped with a gauge 3, a thermometer 4, and an agitator 5, operated by the crank 6. The jacket 1 may contain water. Steam may be supplied through a pipe 7, having branches` and 9.' T 1e branch 8 connects with the jacket 2, and a branch 9a terminates in a jet 9* located in the lower portion of the jacket l'. The branch 9 -connects with a ,pipe 10 equipped with a T-itting 10a from which a pipe 11 leads to'l the coil 12 of the condenser C. Branch 9 is equipped with a valve 13, and the pipe 10 is equipped with a valve 14. ,The ressure gauge 15 is shown connected with the jacket 2.V I In the use of the apparatus, rosin, sandarac, and alcohol, in proper proportlons,

are introduced into-the tank A, where the solids are 'brought into solution. '.This may require about three hours. The solution is then drawn through a pipe 16 lnto the d1s' tiller B. The pipe 16. is tted with 'a valve f 16a. The distilling tank is brought tao-,and maintained at a temperature about y C. AThe time required for distilling may be about three hours. been distilled olf, and while the rosin compound is still in fluid orviscous condition, a small percentage of raw linseed oil is introduced into the vessel. The agitator is then operated for a period of about ive minutes. The mixture is then drawn from the distilling tank through a draw-off pipe 17. The compound is then subjected to a boiling operation for a period of above twenty-five minutes. A foam or froth forms on top, and this may be burned off by applying a flame in any suitable manner. The molten compound may then be' poured into the molds and allowed to cool.

The process described resultsl in bringing the rosin and gum sandarac into such an intimate mixture as to produce a substantially homogeneous body;.and the compound thus produced is very suitable for use in rosinin the rotary bows (usually nested celluloi disks) of an electrically operated violin. The rosin may be put to analogous uses,

- however.

By means of the pipes and connections shown, steam may be admitted to the con,

denser coil, when desired, to flush out the coil; and steam may be admitted to the'in-` terior of the distilling tank when it is desired to flush out said tank. l Steam pressure maybe employed also to aid in forcing out the contents Aof the distilling tank, if desired.

Ordinarily, however, it is desirable to avoid the introduction of steam into the interior of the distilling tank prior to the distillingJ operation or while the distilling operation is in progress. The presence of Water in the rosin compound in any appreciable quantity hat I regard as new, and desire to secure "by Letters Patent, is:

1. A composition o f matter comprising intimately blended rosin and gum sandarac in a' volatile solvent, the former comprising After the alcohol hasV more than eighty percent of the combined weight of said ingredients.

2. A composition of matter comprising intimately mixed rosin`and gum sandarac in a volatile solvent in proportions of about six and three-fourths pounds rosin and one 'i pound gum sandarac. Y 3. vAcomposition of matter comprlsmg 1ntlmately blended rosin and gum sandarac in j a volatile solvent, the rosin constituting more than eighty percent of the combined Weights of said ingredients, and a small percentage of raw linseed oil combined with the firstmentioned ingredients.

' 4. A method of preparing a rosin comlpound which comprises: dissolving rosin and pound which comprises: dissolving rosin and gum sandarac in a volatile solvent, the rosin constituting at least' eighty percent of the mixture of said ingredients; distilling oft' the solvent; land subjecting the compound to a boiling operation in the presence of asmall percentage of linseed oil.

6. A method of preparing a rosin compound comprising: dissolving rosin and gum sandarac in a volatile solvent, the gum ,sandarac being less tha-n one-fourth the weight of the rosin; and -diwstilling o the solvent.

7. A method of preparing a rosin compound which comprises: dissolving rosin and gum sandarac in a volatile solvent, the rosin constituting at least eighty percent of the two ingredients; distilling off the solvent; and subjecting the compound while in heat- 3d condition to the action of an agitating evice.

8. A methodlof preparing a rosin comi pound which comprises: dissolving rosin and gum sandarac m a volatile solvent, the rosin constituting at least eighty per cent of the Weight of the two ingredients, distilling off the solvent; introducmg lmsecd 011 and mixingjthe rosin compound; and then boiling im the'mixture.

HERBERT S. MLLS. 

